(19)

(11)

EP 3 566 223 A1

(12)

(43) Date of publication: 13.11.2019 Bulletin 2019/46 (21) Application number: 17816417.4 (22) Date of filing: 08.12.2017

(51) International Patent Classification (IPC):  G09B 23/28(2006.01) (86) International application number: PCT/DK2017/050417 (87) International publication number: WO 2018/127262 (12.07.2018 Gazette 2018/28)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD TN (30) Priority: 06.01.2017 CN 201710011210 (71) Applicant: Ambu A/S 2750 Ballerup (DK)	(72) Inventor: ZHAO, Qiaofeng Nanan City Fujian Province (CN) (74) Representative: AWA Denmark A/S  Strandgade 56 1401 Copenhagen K 1401 Copenhagen K (DK)